Astm A335 tus qauv specication rau seamless ferritic alloy-steel yeeb nkab rau high-temperature kev pab cuam
ASTM A335 tus qauv yog muab tso rau hauv qhov chaw ruaj khov A 335 / A 335M; tus naj npawb tam sim tom qab qhov kev xaiv tsa qhia tias lub xyoo ntawm kev txais yuav thawj zaug lossis, nyob rau hauv rooj plaub ntawm kev kho dua tshiab, xyoo kawg ntawm kev hloov kho tshiab. Ib tus lej hauv kab lus qhia txog lub xyoo ntawm kev pom zoo dua zaum kawg. Ib daim ntawv tshaj tawm epsilon (ュ) qhia txog kev hloov kho txij li kev hloov kho zaum kawg lossis rov pom zoo dua.
Scope
1.1Qhov kev qhia tshwj xeeb no suav nrog nominal (nruab nrab) phab ntsa seamless alloy-steel yeeb nkab npaj rau kev pabcuam kub kub (Mote 1). Cov yeeb nkab tau txiav txim rau qhov kev qhia tshwj xeeb no yuav tsum tsim nyog rau kev khoov, flanging (vanstoning), thiab kev ua haujlwm zoo sib xws, thiab rau fusion vuam. Kev xaiv yuav nyob ntawm tus qauv tsim, kev pabcuam, cov khoom siv kho tshuab, thiab cov yam ntxwv kub kub.
CEEB TOOM 1 Α Appendix X1 teev qhov ntau thiab tsawg thiab phab ntsa thicknesses ntawm cov yeeb nkab uas tej zaum yuav tau txais raws li kev coj ua lag luam tam sim no.
1.2 Ob peb qib ntawm ferritic steels (Ceeb toom 2) raug them.
Nco tseg 2
Α Ferritic steels hauv qhov kev qhia tshwj xeeb no tau txhais tias qis thiab nruab nrab-cov hlau alloy uas muaj txog li thiab suav nrog 10％ chromium.
1.3 Cov kev xav tau ntxiv (S1 txog S7) ntawm qhov kev xaiv tau raug muab. Cov kev xav tau ntxiv no hu rau cov kev xeem ntxiv uas yuav tsum tau ua, thiab thaum xav tau, yuav tsum tau teev nyob rau hauv kev txiav txim ua ke nrog cov lej ntawm cov kev xeem uas xav tau.
1.4 Qhov tseem ceeb tau teev nyob rau hauv ib nti-phaus units lossis SI units yuav tsum raug suav tias yog tus qauv. Nyob rau hauv cov ntawv nyeem, SI units tau qhia nyob rau hauv brackets. Cov txiaj ntsig tau teev nyob rau hauv txhua qhov system tsis yog qhov sib npaug; Yog li ntawd, txhua qhov system yuav tsum tau siv nws tus kheej ntawm lwm tus. Kev sib xyaw cov txiaj ntsig los ntawm ob lub tshuab tuaj yeem ua rau tsis ua raws li kev qhia tshwj xeeb. Cov inch-phaus units yuav tsum siv tshwj tsis yog lub npe "M" ntawm qhov kev qhia tshwj xeeb no tau teev tseg hauv qhov kev txiav txim.
Ceeb Toom 3Α Lub dimensionless tus tsim NPS (nominal yeeb nkab loj) tau raug hloov nyob rau hauv cov qauv no rau cov tsoos cov ntsiab lus xws li "nominal inch," "loj," thiab "nominal size."
Khoom siv & Chaw tsim khoom
Cov yeeb nkab tuaj yeem yog kub tiav lossis txias kos nrog kev kho cua sov ua tiav tau sau tseg hauv qab no.
Transverse lossis Longitudinal Tension Test thiab Flattening Test, Hardness Test, lossis Khoov TestMechanical Tests Specified
Rau cov khoom siv hluav taws xob kho nyob rau hauv lub tshuab hluav taws xob batch-hom, kev ntsuam xyuas yuav tsum tau ua ntawm 5% ntawm cov yeeb nkab los ntawm txhua qhov kho. Rau ntau me me, tsawg kawg ib lub yeeb nkab yuav tsum tau sim.
Rau cov khoom siv hluav taws xob kho los ntawm cov txheej txheem tas mus li, cov kev sim yuav tsum tau ua rau ntawm cov yeeb nkab txaus los ua 5% ntawm ntau, tab sis tsis muaj tsawg dua 2 yeeb nkab.
Cov Lus Qhia rau Hardness Test:
P91 yuav tsum tsis txhob muaj qhov tawv tsis tshaj 250 HB / 265 HV [25HRC].
Cov Lus Qhia rau Kev Ntsuas Khov:
Rau cov yeeb nkab uas nws txoj kab uas hla tshaj NPS 25 thiab nws txoj kab uas hla mus rau phab ntsa thickness piv yog 7.0 los yog tsawg dua yuav tsum tau mus rau qhov khoov xeem es tsis txhob flattening xeem.
Lwm cov yeeb nkab uas nws txoj kab uas hla sib npaug lossis tshaj NPS 10 tuaj yeem muab qhov kev sim khoov rau qhov chaw ntawm qhov kev sib tw flattening raws li kev pom zoo ntawm tus neeg yuav khoom.
Cov qauv ntsuas khoov yuav tsum khoov ntawm chav tsev kub txog 180 yam tsis muaj qhov tawg ntawm sab nraud ntawm qhov khoov.
Hydrostatic Test
Sab hauv txoj kab uas hla ntawm qhov khoov yuav tsum yog 1 nti [25 mm].
Txhua qhov ntev ntawm cov yeeb nkab yuav tsum tau kuaj Hydro, ntawm kev xaiv ntawm kev tsim hluav taws xob tsis zoo tuaj yeem siv tau.
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